Distribution of Hangul Word Processor File (HWP) during Academic Conference Season in Korea

On May, ASEC analysis team shared details of Hangul Word Processor file (HWP) malware that is being distributed across various fields (see blog post below). In the past, it was distributed with the titles related to ‘real-estate,’ however, malware today is developed with titles related to thesis and other academic items based on the scheduled academic conferences in Korea. So far, AhnLab discovered 2 filenames that are being used by malicious HWP files, and among the topics discussed in the blog…

Analysis of Connection Between Malicious Hangul Word Processor Files (.hwp) by Theme

In the previous post, ASEC shared information on how the titles of the distributed malicious HWP files changed over the course of 3 months. This post is written as a follow-up to the previous post to shed some light on the new information about relationship between title categories. Connection between Theme 1, Theme 2, and Theme 3 Similarities were found between HWP files of Theme 1 (COVID19), Theme 2 (Real-estate), and the themes that were mentioned in the previous post….

Distribution of HWP Malware via Real-estate Investment Emails (Uses EPS)

Distribution of malicious HWP files that has been increasing since April is still ongoing. In this blog, ASEC will explain about the Hangul Word Processor file (.HWP) disguised as a real-estate investment email (received last week) which is currently being distributed.   Once a user opens the Hangul Word Processor file (.HWP) attached in the email, the malicious postscript (EPS) within the HWP file activates and executes malicious behaviors. The EPS causes CVE-2017-8291 vulnerability so that the code inside starts…

Distribution of Malware Using Word File Disguised as Coin Company Recruitment Table Document

On May 8, AhnLab ASEC analysis team uploaded a post that shed some light on distribution of malware that stole certificate of a Korean gaming company. Since then, AhnLab ASEC confirmed distribution of malware of the same type that went through some modifications. These files are using a variety of filenames, and further information will be explained below. Like the case introduced in the previous blog post, this malware used the recruitment table of a coin company. Furthermore, the attacker…

Malware Stealing Certificate from Major Korean Game Company Spread via Document File

Last month, ASEC analysis team uploaded a blog post about malware disguised as a bonus payment invoice (see link below). Another malware of the same type was found recently, and AhnLab has decided to share more information through this post. The document has a history of distribution via email. The attacker disguised the sender’s address as one of media press. The malicious DLL that runs at the end stole the certificate of a major Korean game company to disguise itself as…